Hook



FIG. 1 is a perspective view of a hook in accordance with the present design;

FIG. 2 is front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side view thereof; and,

FIG. 5 is a left side view thereof.

FIG. 6 is a perspective view thereof showing the hook in an open position;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a hook, as shown and described. 